diff --git a/pandas/core/arrays/masked.py b/pandas/core/arrays/masked.py
index be5070e75cb70..0ee090d992552 100644
--- a/pandas/core/arrays/masked.py
+++ b/pandas/core/arrays/masked.py
@@ -1565,9 +1565,9 @@ def interpolate(
             **kwargs,
         )
         if not copy:
-            return self
+            return self  # type: ignore[return-value]
         if self.dtype.kind == "f":
-            return type(self)._simple_new(data, mask)
+            return type(self)._simple_new(data, mask)  # type: ignore[return-value]
         else:
             from pandas.core.arrays import FloatingArray